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DELL H240AS-00 power supply schematics requiring

i have several of DELL H240AS-00 smps power supply (D240A002L Dell P/N) to be repaired due to a common fault.
Main circuit power mosfet fail with its snubber capacitor, PWM IC and fuse resistor.
This trouble is driving me crazy because i cannot fix it.
Do anybody have a schematic ??